EXCLUSIVE: Paris Jackson's co-guardian TJ on her new boyfriend: 'I keep a close eye on him'

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EXCLUSIVE: Paris Jackson's Co-Guardian TJ Gets Candid About Her Boyfriend

Paris Jackson is (almost) all grown up!

The 17-year-old daughter of the late Michael Jackson made headlines in May as she hit the red carpet with boyfriend Chester Castellaw, 18, a soccer player for the Real So Cal youth soccer club. Now Jackson's co-guardian TJ Jackson, son of Tito Jackson, is giving his take on the budding romance.

"I approve of him," TJ tells ET. "No one's perfect, but he's a good boy, so I approve of him... He treats her well. She's happy."

Photos of Paris Jackson's evolution over the years:

24 PHOTOS
Paris Jackson, Michael Jackson's daughter
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EXCLUSIVE: Paris Jackson's co-guardian TJ on her new boyfriend: 'I keep a close eye on him'
BEVERLY HILLS, CA - MAY 28: Paris Jackson attends the opening night of Deaf West Theatre's 'Spring Awakening' at Wallis Annenberg Center for the Performing Arts on May 28, 2015 in Beverly Hills, California. (Photo by Araya Diaz/WireImage)
From left, Janet Jackson, Paris Michael Katherine, LaToya Jackson, Jermaine Jackson and Prince Michael Jackson I attend a memorial service for music legend Michael Jackson at the Staples Center in Los Angeles, California, Tuesday, July 7, 2009. (Photo by Gabriel Bouys/MCT/MCT via Getty Images)
UNITED STATES - JULY 07: Paris Jackson, left, Prince Michael Jackson II, center, and Prince Michael Jackson I, children of Michael Jackson, stand on stage during the memorial service for their father at the Staples Center in Los Angeles, California, U.S. on Tuesday, July 7, 2009. Jackson's family, friends and music-industry colleagues joined with thousands of fans today to bid farewell to the pop singer at the site where he rehearsed for a series of comeback concerts. (Photo by Mark J Terrill/Bloomberg via Getty Images)
Michael Jackson's daughter Paris Michael Katherine is conforted by her aunts Janet Jackson (R) and LaToya Jackson at a memorial service for music legend Michael Jackson at the Staples Center in Los Angeles on July 7, 2009. AFP PHOTO/GABRIEL BOUYS/POOL (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)
Michael Jackson's daughter Paris Michael Katherine Jackson (C) is comforted by the brothers and sisters of Michael Jackson including Marlon (L) and Randy (2nd L) Jackson at the memorial service for the King of Pop at the Staples Center in Los Angeles on July 7, 2009. AFP PHOTO/GABRIEL BOUYS/POOL (Photo credit should read GABRIEL BOUYS/AFP/Getty Images)
Michael Jackson's children Prince (L) and Paris accept their father's Lifetime Achievement Award at the 52nd annual Grammy Awards in Los Angeles on January 31, 2010. AFP PHOTO/ROBYN BECK (Photo credit should read ROBYN BECK/AFP/Getty Images)
LOS ANGELES, CA - JANUARY 31: Paris Katherine Jackson onstage at the 52nd Annual GRAMMY Awards held at Staples Center on January 31, 2010 in Los Angeles, California. (Photo by Michael Caulfield/WireImage)
(L-R) Paris Jackson, 13, LaToya Jackson, Prince Jackson, 14, and Blanket Jackson, 9, attend a ceremony to honor their father and brother, the late King of Pop Michael Jackson, at Children's Hospital in Los Angeles, California August 8, 2011. Michael Jackson's three children presented the hospital with a gift of 13 pieces of original art created and signed by the late King of Pop. AFP PHOTO / Robyn Beck (Photo credit should read ROBYN BECK/AFP/Getty Images)
Michael Jackson's children, Prince Jackson (L), Blanket Jackson (C) and Paris Jackson (R) speak on stage during the 'Michael Forever' concert in memory of the late Michael Jackson at The Millenium Stadium in Cardiff, Wales on October 8, 2011. AFP PHOTO / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)
LAS VEGAS, NV - DECEMBER 03: Michael Jackson's daughter Paris Jackson arrives at the Las Vegas premiere of Michael Jackson THE IMMORTAL World Tour by Cirque du Soleil at the Mandalay Bay Resort & Casino December 3, 2011 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images for Cirque du Soleil)
LOS ANGELES, CA - JANUARY 26: Paris Jackson (L) and singer Justin Bieber pose at the Michael Jackson Hand and Footprint ceremony at Grauman's Chinese Theatre on January 26, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
HOLLYWOOD, CA - JANUARY 26: (L-R) Prince Michael, Blanket and Paris Jackson with Justin Bieber attend the Michael Jackson 'Immortalized' hand and footprint ceremony held at Grauman's Chinese Theatre on January 26, 2012 in Hollywood, California. (Photo by Michael Tran/FilmMagic)
LOS ANGELES, CA - JANUARY 26: (L-R) Prince Jackson, Paris Jackson and Blanket Jackson appear at the Michael Jackson Hand and Footprint ceremony at Grauman's Chinese Theatre on January 26, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
LOS ANGELES, CA - JANUARY 26: Paris Jackson appears at the Michael Jackson Hand and Footprint ceremony at Grauman's Chinese Theatre on January 26, 2012 in Los Angeles, California. (Photo by Kevin Winter/Getty Images)
FILE - This Aug. 29, 2012 file photo shows Paris Jackson, left, daughter of the late pop icon Michael Jackson, poses with a fan outside Jackson's boyhood home during a celebration on what would have been Jackson's 54th birthday in Gary, Ind. Jackson is physically fine after being taken to a hospital early Wednesday, June 5, 2013, an attorney for Jackson's mother said. Perry Sanders Jr. writes in a statement that Paris Jackson is getting appropriate medical attention and the family is seeking privacy. Fire and sheriff's officials confirmed they transported someone from a home in Paris' suburban Calabasas neighborhood for a possible overdose but did not release any identifying information or additional details. (AP Photo/Charles Rex Arbogast, file)
GARY, IN - AUGUST 29: Prince Michael Jackson I and Paris Jackson attend the press conference for Goin' Back To Indiana: Can You Feel It at the Majestic Star Hotel Lakeshore Ballroom on August 29, 2012 in Gary, Indiana. (Photo by Tasos Katopodis/Getty Images)
LOS ANGELES, CA - JANUARY 27: Paris Jackson attends the Los Angeles opening of 'Michael Jackson THE IMMORTAL World Tour' at Staples Center on January 27, 2012 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
LOS ANGELES, CA - JANUARY 27: (L-R) Blanket Jackson, Paris Jackson and Prince Michael Jackson attend the Los Angeles opening of 'Michael Jackson THE IMMORTAL World Tour' at Staples Center on January 27, 2012 in Los Angeles, California. (Photo by Jason LaVeris/FilmMagic)
GARY, IN - AUGUST 30: Prince Michael Jackson II, Paris Jackson and Prince Jackson attend the St. Paul Saints Vs. The Gary SouthShore RailCats baseball game at U.S. Steel Yard on August 30, 2012 in Gary, Indiana. (Photo by Tasos Katopodis/Getty Images)
GARY, IN - AUGUST 30: Prince Jackson, La Toya Jackson, Prince Michael Jackson II and Paris Jackson attend the St. Paul Saints Vs. The Gary SouthShore RailCats baseball game at U.S. Steel Yard on August 30, 2012 in Gary, Indiana. (Photo by Tasos Katopodis/Getty Images)
BEVERLY HILLS, CA - OCTOBER 11: Paris Jackson and Prince Michael Jackson attend the Mr. Pink Ginseng Drink launch party at Regent Beverly Wilshire Hotel on October 11, 2012 in Beverly Hills, California. (Photo by Jason LaVeris/FilmMagic)
GARY, IN - AUGUST 30: Prince Jackson, La Toya Jackson, Prince Michael Jackson II and Paris Jackson attend the St. Paul Saints Vs. The Gary SouthShore RailCats baseball game at U.S. Steel Yard on August 30, 2012 in Gary, Indiana. (Photo by Tasos Katopodis/Getty Images)
GARY, IN - AUGUST 30: Paris Jackson throws out the first pitch at U.S. Steel Yard on August 30, 2012 in Gary, Indiana. (Photo by Michael Hickey/WireImage)
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WATCH: Paris Jackson and Her Boyfriend Make Their Red Carpet Debut

Still, 37-year-old TJ is definitely keeping a watchful eye over the teen lovebirds.

"It depends on which day you ask me," he admits. "He's a good kid. He's an ambitious kid, you know. He's a teenage boy, so like any parent, guardian, step-parent or adopted parent, you gotta keep an eye on him. I was a young man too once, so I keep a close eye of him."

ET was with TJ and his brothers Taryll and Taj -- who together make up the R&B-pop trio 3T -- on Thursday during a visit to the set of their upcoming Lifetime docuseries, The Jacksons: Next Generation, which will premiere on Oct. 2.

WATCH: Janet Jackson Shuts Down Tour Production to Be With Her Father

The brothers also gave a health update on their grandfather, Joe Jackson, who suffered a stroke on his 87th birthday, July 25, in Brazil.

"He's doing better," Taj says. "It's hard because [at] a certain age you start [to] cherish all the times that you have with them and stuff like that...He's just such an important point to this family as well. I sometimes think he doesn't get the credit that he deserves, but I'm so thankful for what he did for our family."

Photos of Paris' late father, Michael, from throughout his legendary career:

45 PHOTOS
Michael Jackson (Through the Years)
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EXCLUSIVE: Paris Jackson's co-guardian TJ on her new boyfriend: 'I keep a close eye on him'
FILE - In this Aug. 29, 1993 file photo, pop singer Michael Jackson performs during his "Dangerous" concert in National Stadium, Singapore. (AP Photo/C.F. Tham, file)
CIRCA 1969: R&B quintet 'Jackson 5' pose for a portrait in circa 1969. Clockwise from bottom left: Michael Jackson, Tito Jackson, Jackie Jackson, Jermaine Jackson, Marlon Jackson. (Photo by Michael Ochs Archives/Getty Images)
The Jackson 5 perform during the "Sonny and Cher Comedy Hour" in Los Angeles, Calif., Sept. 15, 1972. The brothers, from left to right, are, Tito; Marlon; lead singer Michael, the youngest; Jackie; and Jermaine. (AP Photo)
American singer Michael Jackson poses at a hotel while on tour with Jackson 5, London, England, November 1972. (Photo by Express Newspapers/Getty Images)
American pop singer Michael Jackson attends the opening of the stage musical 'Dream Girls,' In Los Angeles, 1983. (Photo by Frank Edwards/Fotos International/Getty Images)
Michael Jackson is flanked by brothers Tito, left, and Marlon, right, as the Victory tour of the Jackson’s opens at Rich Stadium near Buffalo, New York Saturday, August 25, 1984. (AP Photo/Rob McElroy)
Pop artist Michael Jackson, center, is shown onstage at opening night of his Victory Tour at Dodger Stadium in Los Angeles, Calif., December 1, 1984. (AP Photo/Lennox McLendon)
Undated picture of US pop singer Michael Jackson. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest, sending shockwaves sweeping across the world and tributes pouring in on June 26 for the tortured music icon revered as the 'King of Pop.' AFP PHOTO (Photo credit should read /AFP/GettyImages)
(FILES) US pop star and entertainer Michael Jackson (R) and actress Brooke Shields arrive at the shrine Auditorium in Los Angeles where Jackson is expected to run away with a major part of the Grammy awards on Febuary 28, 1984. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest, sending shockwaves sweeping across the world and tributes pouring in on June 26 for the tortured music icon revered as the 'King of Pop.' AFP PHOTO/Alan ZANGER (Photo credit should read BERTRAND GUAY/AFP/Getty Images)
FILE - In this July 7, 1984 file photo, Michael Jackson wears a white glove during his performance kicking off the "Victory Tour" at Arrowhead Stadium in Kansas City, Mo. Jackson, 50, died in Los Angeles on Thursday, June 25, 2009. (AP Photo/Cliff Schiappa, file)
FILE - In a Tuesday, Feb. 25, 1986 file photo, Michael Jackson and Lionel Richie receive a Grammy for best song of the year for their song "We Are the World" at the 28th annual Grammy Awards in Los Angeles. Richie, a longtime friend to Michael Jackson, says the country is in need of some healing after the pop star's recent death and the Essence Music Festival in New Orleans is going to provide the perfect remedy. Essence, which begins Friday, July 3, 2009 and runs through Sunday, will feature performances by Richie, Beyonce, John Legend, Ne-Yo, Anita Baker and a host of other artists. Organizers are now also planning a special tribute to Jackson. (AP Photo/Lennox McLendon, File)
From left to right: singer Lionel Richie, Sheila E., actress Elizabeth Taylor, singer Michael Jackson and Diana Ross sing "We are the World" at the close of the American Music Awards on Monday, Jan. 28, 1986 in Los Angeles, United States. (AP Photo/Nick Ut)
American singer Michael Jackson (1958 - 2009) performing on stage, circa 1987. (Photo by Dave Hogan/Getty Images)
American singer Michael Jackson performing, 1987. (Photo by Dave Hogan/Hulton Archive/Getty Images)
Michael Jackson leans, points and sings, dances and struts during the opening performance of his 13-city U.S. tour, Tuesday, Feb. 24, 1988, in Kansas City. (AP Photo/Cliff Schiappa)
FILE - In this Nov. 13, 1988 file photo, pop singer Michael Jackson performs before a sold out crowd for his Bad tour at the Los Angeles Sports Arena. Jackson, 50, died in Los Angeles on Thursday, June 25, 2009. (AP Photo/Alan Greth, file)
Michael Jackson opens the first of a threee-night concert stay promoting his album "Bad", in Rosemont, Illinois, Tuesday night, April 19, 1988. Jackson will be touring the U.S. and Europe for the next three months. (AP Photo/Mark Elias)
LANDOVER, UNITED STATES: American pop music star Michael Jackson sings 13 October 1988 at the Capital Center in Landover, Maryland. AFP PHOTO/Luke FRAZZA (Photo credit should read LUKE FRAZZA/AFP/Getty Images)
(FILES) US pop star and entertainer Michael Jackson performs during the opening concert of the Asian leg of his 'Dangerous' world tour in National Stadium in Bangkok on August 24, 1993. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest, sending shockwaves sweeping across the world and tributes pouring in on June 26 for the tortured music icon revered as the 'King of Pop.' AFP PHOTO/Pongsak CHAIYANUWONG (Photo credit should read PONGSAK CHAIYANUWONG/AFP/Getty Images)
FILE - In this Jan. 25, 1993 file photo, Pop singer Michael Jackson, right, holds his award while posing with actress Elizabeth Taylor at the 20th American Music Awards held at the Shrine Auditorium in Los Angeles. (AP Photo/Mark Terrill, file)
NEW YORK, NY - SEPTEMBER 7: Singer Michael Jackson (R) and guitarist Slash of 'Guns and Roses' perform the opening number at the 1995 MTV Video Music Awards 07 September held at the Radio City Music Hall in New York. Jackson and sister Janet Jackson have been nominted for 11 awards for their video 'Scream.' AFP PHOTO (Photo credit should read DON EMMERT/AFP/Getty Images)
US pop star and entertainer Michael Jackson performs during a concert at Vincennes hypodrome on September 13, 1992. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest, sending shockwaves sweeping across the world and tributes pouring in on June 26 for the tortured music icon revered as the 'King of Pop.' AFP PHOTO/Bertrand GUAY (Photo credit should read BERTRAND GUAY/AFP/Getty Images)
(FILES) US pop star Michael Jackson waves to photographers during a press conference in Paris on March 19, 1996. Michael Jackson died on June 25, 2009 after suffering a cardiac arrest, sending shockwaves sweeping across the world and tributes pouring in for the tortured music icon revered as the 'King of Pop.' AFP PHOTO / VINCENT AMALVY (Photo credit should read VINCENT AMALVY/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 7: Michael Jackson (C) performs at Madison Square Garden in New York 07 September, 2001. It was the first of two performances in New York as part of his '30th Anniversary Celebration, the Solo Years.' AFP PHOTO (Photo credit should read BETH A. KEISER/AFP/Getty Images)
NEW YORK, UNITED STATES: (FILES) This 06 July, 2002, file photo shows pop singer Michael Jackson (L) waving from his limo to fans in the Harlem neighborhood of New York. The child molestation trial against Jackson is scheduled to start 31 January, 2005, in Santa Maria, California. The star has denied 10 charges, including child molestation, plying a child with alcohol to seduce him and of conspiring to kidnap and falsely imprison a child and his family at his Neverland Ranch. He is free on a three million USD bail. AFP PHOTO/Doug KANTER/FILES (Photo credit should read DOUG KANTER/AFP/Getty Images)
LOS ANGELES, UNITED STATES: US pop singer Michael Jackson salutes the audience after recieving the Artist of the Century Award during the 29th Annual American Music Awards at the Shrine Auditorium in Los Angeles 09 January 2002. AFP PHOTO/Hector MATA (Photo credit should read HECTOR MATA/AFP/Getty Images)
NEW YORK, UNITED STATES: US singer Michael Jackson and guitarist Dave Navaro perform during the Democratic National Committee (DNC) benefit concert, 'A Night at the Apollo', at the world-famous Apollo Theater 24 April 2002 in New York. The concert was to kick off a nationwide voter registration drive. AFP PHOTO/TIMOTHY A. CLARY (Photo credit should read TIMOTHY A. CLARY/AFP/Getty Images)
404248 10: Musician Michael Jackson performs at the taping of 'American Bandstands 50th...A Celebration' television special honoring the music show April 20, 2002 in Pasadena, CA. (Photo by Vince Bucci/Getty Images)
BERLIN - NOVEMBER 19: Singer Michael Jackson holds his son eight-month-old son Prince Michael II over the balcony of the Adlon Hotel November 19, 2002 in Berlin, Germany. Jackson is in Berlin with his three children to accept a lifetime achievement award. (Photo by Olaf Selchow/Getty Images)
BERLIN - NOVEMBER 19: Singer Michael Jackson appears at the balcony of the Adlon Hotel with an unidentified child November 19, 2002 in Berlin, Germany. Jackson is in Berlin with his three children to accept a lifetime achievement award. (Photo by Olaf Selchow/Getty Images)
SOWETO, SOUTH AFRICA - JULY 18: US musician Michael Jackson holds a child 18 July in Soweto, South Africa, where he laid a wreath at the memorial for students who died in an uprising on 16 June. Jackson sang a happy birthday song to South African President Nelson Mandela at a surprise meeting with the president shortly after he arrived in the country. AFP PHOTO (Photo credit should read WALTER DHLADHLA/AFP/Getty Images)
SANTA MARIA, UNITED STATES: (FILES) This 13 November, 2002, file photo shows pop singer Michael Jackson arriving inside the Santa Maria Superior Court for a trial in which he is accused of canceling concert appearances and costing the promoter several million dollars. The child molestation trial against Jackson is scheduled to start 31 January, 2005, in Santa Maria, California. The star has denied 10 charges, including child molestation, plying a child with alcohol to seduce him and of conspiring to kidnap and falsely imprison a child and his family at his Neverland Ranch. He is free on a three million USD bail. POOL/SPENCER WEINER/FILES (Photo credit should read SPENCER WEINER/AFP/Getty Images)
SANTA MARIA, CA - NOVEMBER 14: Musician Michael Jackson signs autographs for fans as he arrives at his civil trial in Santa Maria Superior Court November 14, 2002 in Santa Maria, California. The artist is being sued for $21 million by his longtime promoter for backing out of two concerts. (Photo by Bryan Chan-Pool/Getty Images)
SANTA MARIA, CA - NOVEMBER 15: Pop star Michael Jackson testifies during his civil trial in Santa Maria Superior Court on November 15, 2002 in Santa Maria, California. The pop star is being sued for $21 million by his longtime promoter for backing out of two concerts. (Photo by Ed Souza-Pool/Getty Images)
SANTA MARIA, CA - DECEMBER 4: Singer Michael Jackson testifies during the morning session of his civil trial in Santa Maria Superior Court on December 4, 2002 in Santa Maria, California. The artist is being sued for $21 million by his longtime promoter for backing out of two concerts. (Photo by Jim Ruyman-Pool/Getty Images)
Michael Jackson performs at a Democratic National Committee fundraiser at the Apollo Theatre in New York, Wednesday, April 24, 2002. The fundraiser is a kickoff for the party's nationwide voter registration drive. Behind Jackson, actors playing the parts of an Arab and Jew embrace. (AP Photo/Mark Lennihan)
FILE - In this Tuesday, June 24, 2003 file picture, Michael Jackson, left, performs with James Brown during the BET Awards in Los Angeles. Jackson later presented Brown with a lifetime achievement award. Jackson has died in Los Angeles at age 50 on Thursday, June 25, 2009. (AP Photo/Kevork Djansezian)
LAS VEGAS - OCTOBER 27: (TABLOIDS OUT) Singer Beyonce' Knowles and singer Michael Jackson, winner of the 2003 Humanitarian Award, hug onstage at The 2003 Radio Music Awards at the Aladdin Casino Resort October 27, 2003 in Las Vegas, Neveda. For more information on Jackson's humanitarian efforts, go to musicforgiving.org. (Photos by Kevin Winter/Getty Images)
SANTA MARIA, CA - APRIL 30: Singer Michael Jackson gestures while departing the courthouse after his arraignment on April 30, 2004 in Santa Maria, California. Jackson plead not guilty to the grand jury indictment of numerous child molestation charges. (Photo by David McNew/Getty Images)
Pop star Michael Jackson leaves Santa Barbara County Superior Court in Santa Maria, Calif., Thursday April 7, 2005, after another day of testimony in his child molestation trial. A former security guard at Michael Jackson's Neverland ranch told a lurid story Thursday about seeing the singer kiss, fondle and perform oral sex on a boy who later received a financial settlement from the pop star. (AP Photo/Kevork Djansezian)
Michael Jackson performs at the World Music Awards at Earls Court Arena in London, Wednesday Nov. 15, 2006. (AP Photo/Kirsty Wigglesworth)
Michael Jackson waves in Tokyo in this Sunday, May 28, 2006 file photo. Jackson is "reviewing and evaluating" proposals for his future including several offers to perform in Las Vegas, his spokeswoman said Tuesday, Feb. 27, 2007, but he doesn't feel any pressure to make a quick decision. Raymone K. Bain confirmed that, after a period of globe-trotting, Jackson is currently living in Las Vegas. (AP Photo/Shizuo Kambayashi, file)
US singer Michael Jackson announces that he is set to play ten live concerts at the London O2 Arena in July, at the venue itself in south London, Thursday, March 5, 2009. (AP Photo/Joel Ryan)
FILE - In this March 30, 2005 file photo, Michael Jackson exits a courtroom in Santa Maria, Calif. The estate of Michael Jackson has landed the late King of Pop the biggest recording deal in history: a $200 million guaranteed contract with Sony Music Entertainment for 10 projects over seven years, according to a person familiar with the deal. (AP Photos/Hector Mata, pool, File)
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As ET reported last month, Janet Jackson had put her tour prep on pause to be by her ailing father's side, while Joe Jackson posted a message for fans on his website.

"To my family, friends, acquaintances and fans all over the world. I want to thank you all for your prayers, unwavering support and kind well wishes during these trying times," he wrote. "Through God's intervention the wonderful Doctors, Nurses and caretakers at the Albert Einstein Sao Paulo hospital have taken great care of me. God willing, I should be able to make a quick recovery and travel back home soon. Thank you all once again for your prayers and support."

According to the Associated Press, Joe Jackson was released from the Albert Einstein Hospital in Sao Paulo on Monday.


Related - Paris Jackson and her new boyfriend make their red carpet debut:

Paris Jackson and Her Boyfriend Chester Castellaw Make Red Carpet Debut
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